Allow to start Zabbix processes under root and other users

proxy-mysql/alpine/Dockerfile

@@ -10,9 +10,10 @@ LABEL org.opencontainers.image.title="Zabbix proxy (MySQL)" \
 STOPSIGNAL SIGTERM
 
 RUN set -eux && \
-    addgroup zabbix && \
+    addgroup -S -g 1000 zabbix && \
     adduser -S \
             -D -G zabbix \
+            -u 999 \
             -h /var/lib/zabbix/ \
         zabbix && \
     mkdir -p /etc/zabbix && \

proxy-mysql/alpine/docker-entrypoint.sh

@@ -375,6 +375,12 @@ update_zbx_config() {
 
     update_config_var $ZBX_CONFIG "TLSPSKIdentity" "${ZBX_TLSPSKIDENTITY}"
     update_config_var $ZBX_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}"
+
+    if [ "$(id -u)" != '0' ]; then
+        update_config_var $ZBX_CONFIG "User" "$(whoami)"
+    else
+        update_config_var $ZBX_CONFIG "AllowRoot" "1"
+    fi
 }
 
 prepare_proxy() {